Tuesday 1 June 2010

Clever use of blinds and curtains


Curtains and blinds can help improve the thermal performance of your house - more information. Since having ours installed we have learnt a lot about their effectiveness.
The first big shock was the effect of having our house decorated over the period early October up until Christmas last year. We had approached the decorator in May, but that was the best time we could get. Anyway we didn't have any curtains or blinds at our downstairs windows for that whole period; also doors were left open quite a lot during the day and on top of that we had snow from November. All of that led to a massive increase in our use of gas - it came as quite a surprise.
We have noticed some real benefits of our blinds since then. We have a Luxaflex Duette insulating blind on our patio doors. This stops quite a lot of the cold air coming through that large expanse of glass - and it does come through despite being double-glazed. If we raised the blind first thing in the morning we could feel that cold air trapped between the blind and the window and that was then coming into the room. So what we've been doing is waiting for the morning sun to warm up that layer of air, then we open the blind. We can then make the most of the solar gain from the sun coming in through the glass and warming the room.
During very cold weather we often left the blind closed all day as it gives the room a nice light feel even when closed and it's kept the room that bit warmer. At night we add thermally lined curtains to keep the house even more cosy.
Also when it is hot or too sunny we've used the blind to stop too much heat coming into the house. Glaring sun can be excluded by partially closing the blind; too much heat coming in can be prevented by closing the blind altogether to prevent that solar gain. The room is still nice and light but it is a cool oasis when it's been really hot outside. When it is cooler outside at night we've raised the blind to reduce temperatures indoors.
We have a north window that has a Luxaflex Architella blind, which must be about the most insulating blind on the market. We keep it firmly closed in the winter, which definitely reduces the icy draught coming down our stairs! In hot weather we can open it to help us lose some of the heat indoors.
We are seriously thinking about having these blinds in other parts of the house as we are so pleased with how they have worked. If we have another cold winter we hope to also notice the difference in our gas bills - it's clearly not enough just to have double-glazing.

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